Methods and apparatus of building construction resisting earthquake and flood damage

ABSTRACT

A three part foundation system for supporting a building is described. Three part foundation systems can include a containment vessel, which constrains a buffer medium to an area above the containment vessel, and a construction platform. A building can be built on the construction platform. In a particular embodiment, during operation, the construction platform and structures built on the construction platform can float on the buffer medium. In an earthquake, a construction platform floating on a buffer medium may experience greatly reduced shear forces. In a flood, a construction platform floating on a buffer medium can be configured to rise as water levels rise to limit flood damage.

CROSS REFERENCE TO RELATED APPLICATIONS

This patent application claims priority under 35 U.S.C. § 120 and is acontinuation of U.S. patent application Ser. No. 15/194,467, filed Jun.27, 2016, now U.S. Pat. No. 9,790,702, issued Oct. 17, 2017, whichclaims priority under 35 U.S.C. § 120 and is a continuation of U.S.patent application Ser. No. 14/792,194, filed Jul. 6, 2015, now U.S.Pat. No. 9,399,878, issued Jul. 26, 2016, which claims priority under 35U.S.C. § 120 and is a continuation of U.S. patent application Ser. No.14/320,327, filed Jun. 30, 2014, now U.S. Pat. No. 9,103,118, issuedAug. 11, 2015, which claims priority under 35 U.S.C. § 120 and is acontinuation of U.S. patent application Ser. No. 13/843,914, filed Mar.15, 2013, now U.S. Pat. No. 8,777,519, issued Jul. 15, 2014. Theseapplications are incorporated herein by reference in their entiretiesand for all purposes.

FIELD OF THE INVENTION

This invention generally relates to building construction methods, andmore particularly to building construction methods for mitigatingseismic, flood and tsunami damage.

BACKGROUND

It is estimated that over the last hundred years damage from earthquakeshas averaged from 2-4 billion a year in the United States. Damage fromfloods annually yearly costs a similar amount in the United States.Earthquake events tend to happen less frequently than flood events.However, the damage costs for any significant event tend to be quitelarge. World-wide, the costs in lives and physical damage are muchgreater.

In the U.S., Earthquake risk is primarily focused on the West Coast.However, the new Madrid fault system where Illinois, Kentucky,Tennessee, Missouri and Arkansas come together along the upperMississippi river also has the potential for generating a largeearthquake. Flood damage can occur nearly anywhere in the U.S.

Away from coastal regions, flooding primarily is caused from overflowingof rivers and their associated tributaries. On the coasts, which havethe highest population density (half of the US population lives within50 miles of the coast), flooding is caused from overflowing rivers,storm surges and tidal surges. It is expected global warming and anassociated rises in sea level and weather variability will onlyexacerbate coastal flooding and inland flooding issues. In addition, theWest coast, Hawaii and Alaska face a significant flooding threat fromTsunamis and associated earthquakes. It is estimated the repair of thedamage from recent earthquake and tsunami in Japan in 2011 will cost onthe order of $300 billion dollars.

Cost effective methods for mitigating flood and earthquake damage arelimited. For floods, one method is to determine flood prone regions andavoid building in these areas. Flood maps often affect the availabilityand pricing of land and insurance in the areas covered by the maps.Another method for flood mitigation is to raise the building.Essentially, a multi-story building is constructed where the lower levelremains unused, which is inefficient. This method is sometimes appliedto smaller buildings, such as houses, but is not generally applied tomedium or larger sized buildings. Further, the construction is usuallynot sufficient to withstand powerful flood conditions.

Levees are used to control floods. However, levees are expensive tobuild and maintain, have a high-environmental impact, utilize a lot ofland and, in areas with earthquake risks, are vulnerable to collapse inan earthquake. Further, as past experience has shown, levees arevulnerable to point failures where a breach at just one location canmitigate most of the benefits of building the levee in the first place.

For seismic activity, earthquake maps guide building practices and insome instances may identify areas subject to soil liquefaction which areunsuitable for building. To mitigate seismic damage, larger buildings,such as skyscrapers, sometimes use base isolation and/or vibrationdampening systems to mitigate earthquake damage. Medium and smaller sizebuilding use building techniques and/or are retrofitted withstrengthening mechanisms which prevent catastrophic failure andsubsequent loss of life but still subject the building to significantdamage in an earthquake. Base isolation is generally not considered costeffective for medium and smaller size building and is rarely applied.

In view of the above, improved and cost-effective methods and apparatusfor constructing buildings which mitigate seismic and flood damage areneeded.

SUMMARY

A three part foundation system for supporting a building is described.Three part foundation systems can include a containment vessel, a buffermedium and a construction platform. The construction platform rests onthe buffer medium which rests on the containment vessel. A building canbe built on the construction platform. The buffer medium can be a fluid,a gas or a liquefiable solid. In the case of a fluid buffer medium, suchas water, the construction platform can be designed with a sufficientlylow density such that the construction platform and building float ontop of the buffer medium where the containment vessel constrains thebuffer medium to at least an area between the containment vessel and theconstruction platform.

In an earthquake, the containment vessel can experience seismic forces,such as large lateral forces, which are minimally transferred throughthe buffer medium to the construction platform and any buildingsresiding on the construction platform because of the buffer medium'slimited transmission of seismic forces. Thus, a relatively simple andcost effective base isolation system is achieved. In a flood, as a longas the construction platform and the associated buildings aresufficiently buoyant in water, the construction platform and buildingcan rise with the rising water level. Thus, the design of the TPFS canmitigate both earthquake and flood damage in regions subjects to bothfloods and earthquakes or just flood damage in regions only subject tofloods.

A method of construction a three part foundation system for a buildingis described. The method can be generally characterized as a) forming acontainment vessel for holding a buffer medium on a ground; b) fillingthe containment vessel with the buffer medium; c) testing whether thecontainment vessel holds the buffer medium; d) draining the buffermedium from the containment vessel; e) forming a construction platformabove the containment vessel wherein the construction platform includingthe building is configured to float on the buffer medium when the buffermedium is added to the containment vessel; f) adding the buffer mediumto the containment vessel to allow the construction platform and thebuilding to float on the buffer medium; and g) positioning theconstruction platform relative to sides of the containment vessel suchthat during an earthquake the containment vessel can move from side toside while the construction platform floats above it allowing seismicforces transferred from the ground to the construction platform to beminimized. In one embodiment, the construction platform can be assembledfrom pre-fabricated units and it may not be necessary to perform thedraining step d in the above method.

BRIEF DESCRIPTION OF THE DRAWINGS

The included drawings are for illustrative purposes and serve only toprovide examples of possible structures and process steps for thedisclosed inventive systems and methods for providing game services toremote clients. These drawings in no way limit any changes in form anddetail that may be made to the invention by one skilled in the artwithout departing from the spirit and scope of the invention.

FIGS. 1A and 1B are block diagrams of a building constructed on a threepart foundation system in accordance with the described embodiments.

FIG. 2A is a block diagram of a building constructed on a three partfoundation system including a leveling mechanism in accordance with thedescribed embodiments.

FIG. 2B is a block diagram of a building constructed on a three partfoundation system including a centering mechanism in accordance with thedescribed embodiments.

FIG. 2C is a block diagram of a three part foundation system.

FIGS. 3A and 3B are block diagrams of a building constructed on a threepart foundation system with a position stabilization mechanism for floodconditions in accordance with the described embodiments.

FIG. 4 is block diagram of building constructed on a three partfoundation system with water diversion structures for flood conditionsin accordance with the described embodiments.

FIGS. 5A and 5B are block diagrams of a building constructed on a threepart foundation system with waterway access in accordance with thedescribed embodiments.

FIGS. 6A and 6B are perspective drawings of a construction platform fora three part foundation system in accordance with the describedembodiments.

FIGS. 7A and 7B are section views of construction platform componentsfor a three part foundation system in accordance with the describedembodiments.

FIGS. 8A, 8B and 8C are block diagrams showing examples of modular unitsfor forming a construction platform in accordance with the describedembodiments.

FIG. 9 is a flow chart of a method for forming a three part foundationin accordance with the described embodiments.

FIGS. 10A and 10B are section views including examples of containmentvessel components and construction platform components in a three partfoundation system in accordance with the described embodiments.

FIGS. 11A and 11B are section views including examples of containmentvessel components and construction platform components in a three partfoundation system in accordance with the described embodiments.

FIGS. 12A and 12B are section views including examples of constructionplatforms in a three part foundation system having different buoyancyconfigurations in accordance with the described embodiments.

FIGS. 13A and 13B are further examples of construction platforms in athree part foundation system having different buoyancy configurations inaccordance with the described embodiments.

FIG. 14A is a section view of a three part foundation system havinglinked multiple construction platforms and a single containment vesselwith multiple levels in accordance with the described embodiments.

FIG. 14B is a section view with a detail of a three part foundationsystem including a construction platform and a containment vessel withmultiple levels in accordance with the described embodiments.

FIGS. 15A, 15B and 15C are section views of a five story buildingutilizing a three part foundation system with different constructionplatform designs in accordance with the described embodiments.

FIGS. 16A, 16B and 16C are section views of three part foundation systemconfigured for mitigating flood damage in accordance with the describedembodiments.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The present invention will now be described in detail with reference toa few preferred embodiments thereof as illustrated in the accompanyingdrawings. In the following description, numerous specific details areset forth in order to provide a thorough understanding of the presentinvention. It will be apparent, however, to one skilled in the art, thatthe present invention may be practiced without some or all of thesespecific details. In other instances, well known process steps and/orstructures have not been described in detail in order to notunnecessarily obscure the present invention.

As described as follows, construction methods and apparatus aredescribed for mitigating building and infrastructure damage duringearthquake and flooding events. In particular, apparatus and method forconstructing a three part foundation system (TPFS) are described. TheTPFS includes a containment vessel, a buffer medium and a constructionplatform. A building, bridges, roads and/or other structures can beconstructed over and coupled to the construction platform.

The buffer medium can be a gas, liquid or a solid. In the case of aliquid buffer medium, such as water, the containment vessel can beconfigured to hold or constrain the buffer medium to a region above thecontainment vessel. In one embodiment, the containment vessel can beintegrated into the ground on a plot of land and formed from a buildingmaterial such as concrete. Then, the containment vessel can be “filled”with the buffer medium.

In operation, the construction platform rests on the buffer medium. Inthe case of a liquid buffer medium, the construction platform can bedesigned to displace enough of the buffer medium such that the platformand any building constructed on the platform “float” on the buffermedium. The buffer medium can be selected such that seismic forces, andin particular lateral forces which are known to be most damaging tobuilding an earthquake, are not greatly transmitted through the medium.Water is one an example of a potential buffer medium that has thisproperty.

In an earthquake, the containment vessel can experience large lateralforces which are minimally transferred through the buffer medium to theconstruction platform and any buildings residing on the constructionplatform because of the buffer medium's limited transmission of theseismic forces. Thus, a relatively simple and cost effective baseisolation system is achieved. The approach is particularly suitable tosmall and medium sized building where traditional base isolation systemsare too costly to apply. It is also can be scaled to accommodate largerbuildings.

In a flood, as a long as the construction platform and the associatedbuildings are sufficiently buoyant in water, the construction platformand building can rise with the rising water level. If desired, tetheringmechanism can be provided which prevent the construction platform andbuilding from floating away from the containment vessel. Thus, thedesign of the TPFS can mitigate both earthquake and flood damage inregions subjects to both floods and earthquakes or just flood damage inregions only subject to floods.

The TPFS approach is scalable to allow its use on groups of structuresincluding buildings and structures of different sizes spread out over alarge area. It is suitable for use on essential structures which need toremain operative during and after earthquakes or floods, such ashospitals and other buildings needed to coordinate an emergencyresponse. In addition, it may be suitable for use in areas subject tosoil liquefaction during an earthquake or areas located in a floodplain. This feature may allow for land development in areas previouslydeemed unsuitable for development.

Details of the TPFS are described with respect to the following FIGS.1A-16C. In particular, under different operational modes, examples of aTPFS, forces to which a TPFS is exposed and mechanisms for dealing withthese forces are described. With respect to FIGS. 6A, 6B, 7A, 7B, 8A, 8Band 8C different methods and apparatus for forming a constructionplatform in the TPFS are described. With respect to FIG. 9, methods andapparatus for building a TPFS are discussed.

In the description of FIGS. 10A-16C, different features of the TPFS areillustrated. For example, with respect to FIGS. 10A, 10B, 11A and 11Bsome example shapes for the containment vessel and construction platformand interactions between the construction platform and the containmentvessel via the buffer medium are described. With respect to FIGS. 12A,12B, 13A, 13B and 15A-15C, the distribution of buoyant forces resultingfrom different construction platform designs are discussed. With respectto FIGS. 14A and 14B, TPFS designs including multiple linked platformsand a containment vessel with multiple levels are described. Finally,with respect to FIGS. 16A, 16B and 16C, a TPFS configured to onlyutilize a buffer medium in limited operational modes is described.

Three Part Foundation System Overview

FIGS. 1A and 1B are block diagrams of a system 10 including a building18 constructed on a three part foundation system (TPFS). A section viewof the system 10 is shown in FIG. 1A. The TPFS includes a containmentvessel 12, a buffer medium 20 held within the containment vessel and aconstruction platform 16, having a residential building, on top of thebuffer medium 20.

In particular embodiments, the buffer medium can be a liquid, such aswater. In the case of water, additives can be mixed with the water tochange the buoyancy properties. For example, salt can be added to thewater to increase its density and the hence increase the buoyancy force.The water can also be used for secondary purposes, such as firesuppression, drinking water storage or grey water storage.

The buffer medium can be enclosed in some manner (see e.g., see FIG.11A) or can be exposed to outdoor conditions. In one embodiment, a gas,such as air enclosed in a bladder structure of some type can be used, asa buffer medium for supporting the weight of the building. In yetanother embodiment, described in more detail with respect to FIG. 16A, abuilding can be magnetically levitated to create a gap between thecontainment vessel 12 and the construction platform 16. In this example,a gas, such as air, or a liquid, such as water, can be used as thebuffer medium within the gap.

The construction platform 16 can be formed to displace enough of thebuffer medium float on the buffer medium. As a rule of thumb for anincompressible fluid as the buffer medium (e.g., water), to achieveflotation, the weight of the buffer medium displaced is greater than theweight of the construction platform and any additional weight placed ontop of the platform. In general, when the construction platform 16including any other objects placed on the platform, such as building 18,is floating, buoyant forces exerted on the platform are greater than theweight of the construction and all of the objects placed on theplatform. It is estimated using some of the construction practicesdescribed as follows, a three story building can be floated in as littleas three feet of water.

Buoyancy is an upward force exerted by a fluid, which opposes the weightof an immersed object. In a column of fluid, pressure increases withdepth as a result of the weight of the overlying fluid. Thus a column offluid, or an object submerged in the fluid, experiences greater pressureat the bottom of the column than at the top. This difference in pressureresults in a net force that tends to accelerate an object upwards. Themagnitude of that force is proportional to the difference in thepressure between the top and the bottom of the column, and is alsoequivalent to the weight of the fluid that would otherwise occupy thecolumn, i.e. the displaced fluid.

In FIG. 1A, the containment vessel 12 is a flat bottomed structure withvertical sides. The vessel 12 includes an inner surface 28 and an outersurface 30. The distance between the inner surface 28 and outer surface,i.e., the thickness of vessel 12 is relatively constant. The shape ofthe containment vessel 12 is shown is for illustrative purposes only. Ingeneral, any shape which allows containment of a buffer medium issuitable. For example, the bottom of the vessel can be curved orstepped, such that the height/depth 20 of the buffer medium variesacross the vessel. The side wall can be slanted, stepped or curved wherethe height of the side wall can vary. Further, the shape of the outersurface 30 can be different than the shape of the inner surface so thatthe thickness of containment vessel varies.

In operation, the containment vessel 24 and the construction platformcan experience different loads, such as vertical and horizontal, whichare distributed and can vary across their respective surfaces. Forexample, forces on the containment vessel 12 can be exerted from thematerial surrounding it, such as soil or water permeating the soil, anda pressure of the buffer medium contained within it. Forces on theconstruction platform 16 can be the pressure exerted on it by the buffermedium beneath it, the weight of the objects on it and the pressureexerted on the platform resulting from other environment forces, such asthe wind.

The loads placed on the containment vessel and the construction platformcan be relatively static or can be dynamic loads. For example, a heavytruck driving across the construction platform can introduce a dynamicload (see e.g., FIG. 2A). As another example, during an earthquake, aseismic wave passing through the containment vessel can introduce adynamic load. In FIG. 1A, horizontal and vertical forces, whosedirection and magnitude can change, are shown at a first point 24 withinthe containment vessel 12 and a second point within the constructionplatform 24.

As described above, during an earthquake, the design of the TPFS canmitigate damage which is transmitted to the construction platform 16 andthe building 18. In particular, when a buffer medium is used thattransfers very little of the shear forces, the containment vessel 16 canmove laterally underneath the construction platform 16 while theconstruction platform remains relatively still. Thus, the damage to theconstruction platform 16 and building 18 from the shear component of theseismic wave, often referred to as the S wave, are mitigated. The upwardor thrust portion of the wave can cause the building to bob up and downlike a cork on the water. Thus, the damage to the construction platform16 and building form the upward movement of the seismic wave, oftenreferred to as the P wave, are reduced. For most earthquakes, the S waveis considered the most destructive component of the seismic waves forstructures.

In FIG. 1A, a vertical spacing 22 is shown between the bottom of theconstruction platform 16 and the containment vessel 12 and a horizontalspacing 21 is shown between an outside of the construction platform 16and an inside of the containment vessel 12. In one embodiment, thehorizontal spacing 21 can be selected such that the constructionplatform 16 doesn't contact the sides of the containment vessel 12 orcontact is minimal during an earthquake. The vertical spacing 22 can beselected such the construction platform 16 doesn't bang against theinner bottom of the containment vessel. Thus, based upon, an earthquakeshaking profile, which is selected for design purposes, a minimumspacing distribution can be determined between the construction platform16 and the containment vessel 12.

In FIG. 1B, a top view of the containment vessel 12 and constructionplatform 16 from FIG. 1A is shown. The construction platform 16 andcontainment vessel 12 are rectangular shaped. Spacing 38 and 40 betweenan outer perimeter of the construction platform 16 and the innerperimeter 32 of the containment vessel 12 can vary, as is shown in FIG.1B. As described above, it may be desirable to maintain a minimumspacing between the sides of the platform 16 and vessel 12. However,spacing above the minimum may be acceptable. Thus, as shown in FIG. 12,the spacing can vary.

The outer perimeter 34 and the inner perimeter 32 of vessel 12 are bothrectangles. The inner perimeter 32 and outer perimeter 34 can bedifferent shapes which are different from one another. A generalpolygonal shape can be employed for either the inner perimeter 32 or theouter perimeter 34. Further, the shapes can include curved portions andcan be asymmetrically configured. In addition, the outer perimeter 36 ofthe platform 16 can be formed as a general polygonal shape. In addition,its shape can include curved portions and can be asymmetricallyconfigured.

The platform 16 can be subject to rotational forces. For example, windcan cause the platform 16 rotate when depending on the shapes ofstructures and their distribution on the platform 16. The platform 16rotating 42 around point 44 is shown as an example.

In one example, the platform 16 can be designed for rotation. Forexample, a large enough space can be provided between the outerperimeter 36 of the platform 16 and the inner perimeter 32 of the vesselto allow for a partial or a full 360 degree rotation of the platform 16.With intentional rotation, the building 18 can be orientated during theday such that one side always faces the sun or the building makes anumber of rotations during the day. Thus, a person could watch thesunrise from a window facing the sun in the morning and a sunset fromthe same window at night. A motor or some other force generatingmechanism can be coupled to the platform to cause it to rotate.

For earthquake applications, it may be desirable to position thecontainment vessel relative to the construction platform so that aminimum spacing is maintained between the two components of the TPFS. Inaddition, it may be desirable for use purposes to keep the constructionplatform level as possible. As described above, various loadingsituation can occur that cause the platform to move from a desiredorientation. In some embodiments, to prevent movements anchoringmechanisms can be utilized. Further, to reposition the platform when ithas moved from a desired position, positioning mechanisms can beutilized. A few examples of loading situations involving anchoring andpositioning mechanisms are described with respect to FIGS. 2A and 2B.

In FIG. 2A, a truck 50 is shown driving onto the construction platform16 using a ramp 52. The ramp 52 can be a permanently attached to theconstruction platform, such as via a hinge mechanism or can betemporarily attached to the construction platform. As an example ofbeing temporarily attached, the ramp 52 can be configured to be raisedup like a draw bridge on the containment vessel side 12 or theconstruction platform side. To allow a vehicle to pass, depending on theside in which it is raised, the ramp can be lowered down and can betemporarily secured to the construction platform 16 or to thecontainment vessel 12. It can also be secured near the containmentvessel. The ramp or causeway can also telescope laterally into eitherthe construction platform or the containment vessel to allow lateralmovement while maintaining its function or may simply be allowed toslide over either the construction platform or the containment vessel.

When the ramp 52 is permanently secured to the construction platform 16and the containment vessel 12, the ramp can also be used to hold theconstruction platform in place relative to the containment vessel. Asdescribed above, for earthquakes, it can be desirable to maintain aminimum spacing between the containment vessel 12 and the constructionplatform 16 such that the impacts between the two components isminimized during an earthquake. In addition, as described above, it isdesirable to prevent the lateral motions of the earthquake from beingtransmitted from the containment vessel 12 to the construction platform16. To prevent the transfer of the forces, the ramp 52 can be designedto break or detach in some manner from the construction platform 16 orthe containment vessel 12 when sufficient lateral forces are generatedto allow the construction platform and the containment vessel to moverelatively independently of one another.

Like an electrical fuse, the breaking of the link above a thresholdvalue can be referred to as a mechanical fuse. In one embodiment, themechanical fuse can be designed for activation (link breakage) by thefaster seismic P (compression) wave of an earthquake. Typically, theP-wave arrives at least a few seconds before the more destructiveS-wave.

In related example regarding securing the position of the containmentvessel relative to a construction platform, an attachment mechanism 46is shown between the construction platform 16 and the containment vessel12. One or more attachment mechanisms can be used to maintain a positionof the construction platform 16 relative the containment vessel. The oneor more attachment mechanisms can be non-weight bearing members.Further, like the ramp example described above, the one or moreattachment members can be fused to detach in an earthquake to allow thecontainment vessel 12 to move relative the construction platform 16. Inaddition, during a flood condition, in which it is desirable to allowthe construction platform 16 to rise up relative to containment vessel12, the one or more attachment mechanisms, such as 46, can be configuredto extend and/or detach.

In FIG. 2A, the platform is shown tilted as a result of the truck 50moving on to the platform as compared to FIG. 1A. In general, addingadditional weight onto to the construction platform 16 at a particularlocation can cause the platform to tilt. In one embodiment, the TPFS caninclude one or more weight distribution systems that can be used tolevel the construction platform 14. For example, the platform 16includes a ballast system 54 for use as a weight distribution system.The ballast system in this example includes two connected tanks 56 a and56 b. As described with respect to FIGS. 6A and 6B, more than twoballast tanks can be utilized.

In operation, a control system can determine a tilt of the constructionplatform 16 and then move liquid from one tank to the other tank toredistribute mass on the platform and level out the platform. Forexample, a liquid can be moved from tank 56 b to 56 a to add weight tothe side of the platform 16 opposite the truck 50 to balance out theweight of the truck and level out the platform. In other embodiments,the tanks don't have to be connected. For example the platform 16 caninclude a number of independently controllable tanks which can be filledor emptied to change the mass distribution of the system. Other massdistribution system for leveling purposes can be utilized, such asmovable solid weights, and the example of a ballast system is describedfor illustrative purposes and is not meant to be limiting.

In one embodiment, one or more vessels filled with a liquid, such aswater, can be positioned on or above the construction platform. One ormore sensors can be provided which can be used to detect a presence of aheavy object such as the truck 50. Data from the sensor can be used totrigger a release of liquid from vessels, such as 55 a or 55 b, toprovide a reduction in weight in the platform which limits or preventsit from tipping. The liquid may drain out due to the force of gravity.For example, when a presence of the truck 50 is detected, a vessel, suchas 55 b, filled with water located on the same side of the platform asthe truck 50 can receive a signal that causes the vessel to rapidlydrain. The release of the water can cause the platform to lighten on thetruck side which then can reduce the tilt of the platform resulting fromthe presence of truck 50.

Next, with respect to FIG. 2B, additional positioning mechanisms aredescribed. FIG. 2B is a top view of the TPFS including the building 18.In this example, a number of positioning cables 58 a, 58 b, 58 c and 58d are shown attached to the construction platform 16. The positioningcables can be each coupled to motors or manually operated spools. Themotor and/or spools can be used to adjust the length of and tension ofeach cable to position the construction platform relative to thecontainment vessel, such as shown in the FIG. 2B, when the platform 16has rotated relative to the containment vessel.

In one embodiment, the positioning cables and associated cable lengthcontrol mechanisms can be anchored to the containment vessel 12 or nearthe containment vessel 16. A sensor system can be used to determine aposition of the platform 16 relative to the containment vessel 12. Acontrol system which is coupled to the sensor can be used to operate thecable length control mechanisms to position the platform 16. In a flood,the cables can be lengthened to allow the platform to rise higher. Inone embodiment, the cable attachments can be mechanically fused such thecables are released during a significant event, such as an earthquake ora flood event.

In another example, a number of motors can be coupled to a free floatingplatform 16, such at each corner of the platform 16. The motors, such aselectric motors, may be separately controlled and directed to positionthe platform relative to the containment vessel. In yet another example,gyroscopes can be included with the platform 16 to provide a positioningforce. In general, many different types of positioning mechanisms, whichallow the construction platform to be moved, can be utilized and theseexamples are described for the purposes of illustration only.

In the examples of FIGS. 1A, 1B, 2A and 2B, the buffer medium has beenprimarily described as a liquid, such as water, where the containmentvessel contains the buffer medium to a particular location and theconstruction platform “floats” on the buffer medium. In general, asshown in FIG. 2C, the construction platform 16 rests on the buffermedium 14, which rests on the containment vessel 12. The containmentvessel 12 can be integrated into the ground 45.

The buffer medium 14 can be configured to minimize the transfer ofseismic forces from the ground 45, through the containment vessel 12 tothe construction platform 16. The buffer medium 14 can be constrained orclosed in a structure of some type. For example, air or a liquid can beencased in a bladder which supports the weight of construction platform16.

In the instance of a flood, the construction platform can besufficiently buoyant to rise in the flood waters. When air bladders orsome other enclosed lightweight structure are used as a buffer medium14, the buffer medium 14 can be coupled to the construction platform toprovide additional buoyancy during a flood. When a heavier buffer mediumis used, such as bladders filled with water, the construction platform16 can be configured to decouple from the buffer medium 14 in a floodcondition.

In one embodiment, the buffer medium 14 can be a solid or a compositematerial. The solid or composite material can be configured to undergo aphase change to a liquid or a material that acts like a liquid during orjust prior to an earthquake. For example, a current or heat can beintroduced to a solid buffer medium material or some chemical reactioncan be induced to cause it to turn into a liquid like substance duringan earthquake. In another example, the buffer medium can include smallsolid particles which act like a liquid under the shaking conditionsintroduced during an earthquake.

In yet another embodiment, the construction platform 16 can beconfigured to rest directly rest on the containment vessel 12. During anearthquake, a magnetic interaction can be induced between theconstruction platform 16 and the containment vessel 12 which causes theconstruction platform 16 to levitate above the containment vessel. Whilelevitating, an air gap is introduced between the two components. The airgap acts as a buffer medium 14. Further details of this embodiment aredescribed with respect to FIGS. 16A, 16B and 16C.

Flood Design

In this section some designs associated with flood performance aredescribed. In FIGS. 3A and 3B, one configuration 70 of a building 18constructed on a three part foundation system with a positionstabilization mechanism for flood conditions is shown. In variousembodiments, one or more cantilevered columns can be utilized to providethe position stabilization.

The cantilevered columns, such as 72 a and 72 b, can pass through anopening in the construction platform 12 and through the containmentvessel 12 to allow the one or more cantilevered columns to be anchoredin the ground beneath the containment vessel. In one embodiment, acompressible sealing mechanism, such as a compressible rubber seal, canbe used between a cantilevered column and the containment vessel. Thecompressible sealing mechanism can be used to prevent the buffer mediumfrom leaking out of the containment vessel at the cantileveredcolumn/containment vessel interface. In addition, it can allow thecantilevered column to move relative to the containment vessel so thatmovements of the cantilevered columns don't crack or damage thecontainment vessel 12.

As shown in FIGS. 3A and 3B, the cantilevered columns, such as 72 a, 72b, 72 c and 72 d, can extend above the height of construction platform16. During flood conditions, the construction platform 16 can risevertically as guided by the cantilevered columns while its positionremains above the containment vessel 12. In the example of FIG. 3A,flood waters have filled the containment vessel and extend above the topof the containment vessel 12 causing the construction platform 16 torise. When the flood waters subside, the construction platform 16 cansink as the water level drops.

In FIG. 3B, four cantilevered columns, 72 a, 72 b, 72 c are 72 d, areplaced near the corners of the platform 16. In general, one or morecantilevered columns can be utilized where the cantilevered columns canbe positioned anywhere in the interior of the platform 16. The aperturethrough the construction platform 16 can be sized to provide an adequatespacing distance between the platform and the cantilevered columns. Theselected spacing distance can allow the platform 16 to move back andforth relative to the one or more cantilevered column during anearthquake without hitting or minimally impacting the cantileveredcolumns. To maintain the spacing of the platform relative to thecantilevered columns, as described above, one or more positioningmechanisms can be utilized.

In one embodiment, additional flood control measures can be utilized,such as water diversion mechanisms. FIG. 4 shows one configuration 80 ofthe building 18 constructed on a TPFS with water diversion structures,84 and 86, for flood conditions. The TPFS includes four cantileveredcolumns, as described above in FIGS. 3A and 3B, which allow theconstruction platform 16 to rise relative to the containment vessel 12during a flood. In addition, two water diversion structures 84 and 86are shown. Water diversion structures can be used to divert water aroundthe TPFS and the building to minimize lateral forces of the water on theentire TPFS while allowing controlled flooding.

In the example of FIG. 4, flood waters 82 are diverted around thestructure 84 to prevent the water from directly impinging on theconstruction platform 16. The direction of the flood waters can varydepending on whether the flood waters are rising or receding. Forexample, the flood waters, such as 82, can occur as the flood water isrising. When the flood waters, such as 88, recede, the water diversionstructure 86 can be used to divert the receding flood waters. If thevelocity of the current is sufficient, the cantilevered columns can bedamaged and/or broken. If the cantilevered columns are broken, it may bepossible that the platform to floats away. The use of the waterdiversion structures, 84 and 86, can lessen the likelihood of thecantilevered columns breaking or being damaged during a flood.

The placement of the diversionary structures can depend on historicalpatterns of flooding. For example, for preventing flood damage from atsunami, a diversionary structure can be placed in location expected toreceive the greatest forces from arriving waters. A similardetermination can be made for a building located in a flood plain ornear a wash that seasonally floods.

Open to Body of Water Design

With respect to FIGS. 5A and 5B, a TPFS configured for use near a bodyof water is described. In the configuration 100 of FIGS. 5A and 5B, abuilding 102 and a tree 112 residing on top of a construction platform110 is described. The containment vessel 106 is positioned next to abody of water 118. The body of water 118 can be a lake, a river, anocean, etc. A boat 104 is docked next to the dock 114.

In one embodiment, the wall 116 of the containment vessel 106 facing thebody water 118 can be lower than the surrounding walls. When water fromthe body of water 118 reaches the height of wall 116, water from thebody of water 118 can mix with the buffer medium 108 of the TPFS. Whenwater from the body of water 118 is below the height 116 of the wall,then the buffer medium 108 and the body of water are separated. In oneembodiment, a pump can be used to pump water from the body water 118 andinto the containment vessel to keep the containment vessel 106 filled.This function can be useful when the water level of the body of water118 is below the height 116 of the wall for a significant amount oftime, such as during a drought.

Constructing a TPFS

In this section, methods for construction a TPFS are described. Inparticular, structures associated with the construction platform aredescribed with described with respect to FIGS. 6A-8C and a method ofconstructing the TPFS is described with respect to FIG. 9. In FIG. 6A,an assembled construction platform 150 for a TPFS is shown. A cutawaysection 160 is included to expose an interior portion of theconstruction platform 150. The construction platform 160 is shown forpurposes of illustration only and is not meant to be limiting. Forexample, as described above, the shape of the platform 160 is notlimited to a rectangular shape as shown in FIG. 6A and can bearbitrarily shaped as described above.

In FIG. 6B, different layers of the construction platform 150 are shown.The top layer can be decking. A building can be built over the top ofthe decking 152. Layer 154, beneath the decking, can be a sub-floorsystem, such as concrete slab. In one embodiment, a gap can be providedbetween the decking 152 and the sub-floor system 154 to run utilities.In another embodiment, a structure can be built directly on top of thesub-floor system without the use of decking 152. In yet anotherembodiment, the decking may only cover a portion of the sub-floor system152, such in an area surrounding a building.

In one embodiment, the sub-floor system layer 154 can be formed byarranging a number of blocks, such as 160, of a low density material.Typically, the density of the material is significantly less than thedensity of water. For example, the blocks can be generated fromclosed-cell polystyrene foam, polyethylene foam or neoprene rubber foam.The density of polystyrene foam is between about 28-45 kg/m³ whichcompares to a density of water which is about 1000 kg/m³. In thisexample, the blocks are rectangular shaped. In other embodiments, asdescribed respect to FIGS. 8A, 8B and 8C, blocks of different shapes canbe used.

The blocks in layer 156 b, such as 160, can be arranged with spacesbetween the blocks. Forms can be used around the outside perimeter.Then, concrete can be poured over the top of the blocks such that theconcrete fills the spaces between the blocks and forms a layer above theblocks. The concrete structure between the block is shown in layer 156a. The concrete can be poured above the blocks to some thickness tocomplete sub-floor system 154.

In one embodiment, one or more larger voids can be left between theblocks 160. For example, one of the blocks can be removed in layer 156b. In one embodiment, the void can be covered such that the top of thevoid is covered in concrete or another foundation material. In anotherembodiment, the void can extend through platform 150. For example, thevoid can allow a cantilevered column or some other structure to passthrough platform as described above with respect to FIGS. 3A and 3B.

In the example of FIG. 6B, two hollow tubes 158 are placed between theblocks. In one embodiment, the hollow tubes 158 can be filled with wateras part of a ballast system as described above with respect to FIG. 2A.In another embodiment, after the sub-floor system 154 is generated, thehollow tubes 158 can be removed. Then, a number of independentlyfillable tanks, such as tanks the size of blocks 160 can be placed inthe void left by the tubes. If desired the tanks can be connected to oneanother to allow a liquid to be transferred from one tank to anothertank. In FIG. 6B, a number of compartments 164 for smaller tanks and onelarger tank 162 are shown in layer 156 a. Other mechanisms or structurescan be placed in any of the compartments formed in the platform 150 andthe example of tanks is provided for the purposes of illustration only.

Another example of a construction platform 170 is shown in FIG. 7A. Inthis example, rectangular blocks 172 have been arranged touching oneanother and then channels have been formed in the blocks. The channelsdon't reach all the way through the blocks. Concrete is poured such thatit fills the channels and covers the blocks to form top layer 174 andchannel structures, such as 176.

In FIG. 7A, the channels are shown formed where the adjacent blockstouch. In another embodiment, the channels can be formed in the centerblocks, such that there is no crack below the channel structure 176. Inyet another embodiment, blocks can be formed with a lower lip. Thus,when arranged, the lips of the blocks touch and a channel is formedabove the lips. This channel can be filled with concrete when thesub-floor system is generated.

In FIG. 7B, another configuration of a construction platform 180 isshown. For configuration 180, blocks, such as 184, are bonded totogether in a layered structure. For example, the blocks, such as 184,can be bonded together using an epoxy of some type. If desired voids,such as 186, can be carved in the blocks or the blocks can be arrangedsuch that a void is formed. The void 186, as shown in FIG. 7B, is cutthrough multiple blocks. The block in each layer can have differentmaterial properties if desired. Further, the blocks in each layer can bedifferent shapes.

In other embodiments, the blocks can be shaped or carved to generate astructure of some type. For example, curved portions can be cut off ofthe blocks. In 182, a number of curved portions have been cut off theblocks to form a curved bow. As will be described below in more detail(e.g., see FIGS. 10A and 10B), a curved bow can be used to mitigate waveaction in the buffer medium. As described above with respect to FIG. 7A,channels can be carved in the blocks. In 180, the channels are filledand a top layer is formed over the channels to generate a sub-floorsystem 188.

As described above, different shaped blocks can be used to form aconstruction platform. In FIG. 8A, a structure 200 is formed fromtriangular blocks, such as 202, to generate a six-sided constructionplatform. Channels can be carved in the blocks or spaces can be leftbetween the blocks to allow a sub-floor system to formed over andpenetrate into the blocks as described above. In the example of FIG. 8A,the blocks, such as 202, surround a void 204. In one embodiment, thevoid can extend through the sub-floor system such that a void is leftthrough the construction platform. In another embodiment, the void 204can be covered by the sub-floor system. As described, a structure ormechanism can be located in the void 204, such as one or more ballasttanks.

In one embodiment, the blocks can be cubic or take on otherthree-dimensional shapes, as a tetrahedron. The three dimensional blockscan be pre-formed with voids or channels for receiving cables or pipingused for providing utilities. In another embodiment, a low densitythree-dimensionally shaped unit and a sub-floor can be prefabricated asa single unit. Attachments points can be provided with each of thesepre-fab units, which allow them to be linked to one or more other units.A number of the units can be link via the attachment points to form aconstruction platform.

In FIG. 8B, a structure 210 for a construction platform is formed usinghexagonal shaped blocks, such as 214. The blocks are arranged to formvoid 204. If the construction platform follows the sides of the blocks,then a twenty-five sided platform formed. In another embodiment, arectangular sub-floor system can be formed over the ten hexagonal blocksto generate a four-sided construction platform.

In FIG. 8C, eleven octagonal shaped blocks, such as 222, are used toform a structure 220 used in a construction platform. The blocks can bearranged to form voids 224 and 226. The voids are shaped differently. Asub-floor system, such as a poured concrete system, can be formed abovethe structure 220. In alternate embodiments, combinations of differentshaped blocks can be used. For example, the triangular shaped blocks,such as 202, can be combined with the hexagonal shaped blocks 212 toform a structure (not shown).

Next details of methods of constructing a TPFS (Three Part FoundationSystem) are described. FIG. 9 is a flow chart of a method 300 forforming a TPFS. In 302, a compaction inspection can be performed. Thecompaction inspection can determine if the soil is in a state, such as adense enough state, which can support the proposed constructionincluding the TPFS. In 304, the project can be staked out. The stakesdetermine locations of certain components, such as the boundaries andthe elevations of the containment vessel(s).

In 306, forms for the containment vessel can be placed. The formsprovide molds into which a material used for the foundation, such asconcrete, can be poured. In 308, utilities can be stubbed. In thisprocess, objects which form passages through containment vessel can beplaced. For example, plumbing pipes and/or electrical conduits can belaid out in locations where concrete is to be poured and then theconcrete used to form the containment vessel can be poured over thesepipes and conduits.

Areas can be dug out under the foundation (under slab). In 310, theseareas can be filled with drain rock. Pipes can be coupled to the drainto allow water to be drained away and prevent moisture build upunderneath the foundation. Traditional foundations typically require amoisture barrier between the drain rock and the foundation. In thismethod, since the containment vessel is likely to be filled with water,the moisture barrier may not be required. Next, in 310, rebar andanchors can be placed above the drain rock.

In 312, the foundation area can be inspected prior to pouring theconcrete. When it is satisfactory, the foundation work can continue. In314, a concrete slump test is performed. The concrete slump test is usedto determine that a batch of concrete which is to be poured issatisfactory for use in the foundation. When the concrete issatisfactory, in 316, the concrete can be poured, finished and allowedto cure.

In 318, the form work can be removed. In 320, the concrete associatedwith the containment vessel can be water-proofed. In one embodiment,water proofing can involve mixing an additive with the concrete togenerate a water proof concrete, such as a crystalline waterproofconcrete. In another embodiment, water proof membranes can be applied tothe concrete.

Typically, areas around the containment vessel will have been dug out.After the containment vessel is formed, the excavated areas can befilled in. In 322, an inspection can be performed to make sure thecontainment vessel is ready for the backfill material and to determinewhether there are any flaws in the containment vessel foundation beforeit is covered with the backfill material.

In some instances, the backfill material can exert a force on thecontainment vessel, such as on sidewalls of the containment vessel.Thus, the inspection can be performed to make sure the containmentvessel is ready to support the forces exerted from the backfillmaterial. In 324, the backfill material is added.

In 326, the containment vessel can be filled with the buffer medium,such as water. The containment vessel can be observed and tested to makesure it is adequately containing the buffer medium. In 328, thecontainment vessel can be drained and inspected. Then, it can beprepared for the formation of the construction platform. For example,the boundaries of the construction platform can be marked in somemanner.

In 330, the construction platform can be formed. Some examples ofmethods for forming the construction platform have been described above.For example, foam blocks can be arranged in some manner over thecontainment vessel and forms can be constructed within and around thefoam blocks. If necessary, material can be removed from the blocks toform features, such as channels or voids. In one embodiment, asdescribed above in FIG. 7B, layers of foam blocks can be bondedtogether. In 332, rebar and anchors can be installed, such as in thegaps between the blocks or where channels have been formed in the block.In another embodiment, a concrete structure can be traditionally formedand poured and then the foam can be added afterwards as a liquid, sprayor solid.

In various embodiments, prestressed or poststressed concrete can beused. Prestressed concrete is concrete that has had internal stressesintroduced to counteract, to the degree desired, the tensile stressesthat will be imposed in service. The stress is usually imposed bytendons of individual hard-drawn wires, cables of hard-drawn wires, orbars of high strength alloy steel. Prestressing may be achieved eitherby pretensioning or by post-tensioning.

To pretension concrete the steel is first tensioned in a frame orbetween anchorages external to the member. The concrete is then castaround it. After the concrete has developed sufficient strength thetension is slowly released from the frame or anchorage to transfer thestress to the concrete to which the tendons have by that time becomebonded. The force is transmitted to the concrete over a certain distancefrom each end of a member known as the transfer length.

Post-tensioned concrete is made by casting concrete that contains ductsthrough which tendons can be threaded. An alternative is to cast theconcrete around tendons that are greased or encased in a plastic sleeve.When the concrete has sufficient strength the tendons are tensioned bymeans of portable jacks. The load is transmitted to the concrete throughpermanent anchorages embedded in the concrete at the ends of thetendons. Ducts are usually grouted later or filled with grease toprotect the tendons against corrosion. In some applications thepost-tensioning tendons are run alongside the concrete member. Oneadvantage of post-tensioning is that it permits using tendons that arecurved or draped. (This can be achieved in pretensioning but not soeasily.) Post-tensioning can be done on the jobsite without any need ofheavy temporary anchorages.

In 334, an inspection of the construction platform prior to the pouringthe foundation material (e.g., concrete) can be performed. When theconstruction platform is satisfactory, concrete pouring can proceed.When a batch of concrete is generated, in 336, a concrete slump test canbe performed prior to pouring it. Then, in 336, if the concrete isdetermined to be satisfactory, it can be poured. After pouring, theconcrete can be finished and allowed to cure. After sufficient curing,the form work can be removed.

In an alternate embodiment, all or a portion of steps 330 to 338 can beperformed off-site. For example, the construction platform can beentirely pre-fabricated in a number of sections. The sections can bedelivered to the construction site. Then, these sections can beassembled above the containment vessel. In another example, if thecontainment vessel is located next to a body of water as shown in FIGS.5A and 5B, it may be possible to assemble the construction platform,float it on the water and then tow it to the location of the containmentvessel.

In 340, the TPFS can be tested. For example, the buffer medium can beadded to the containment vessel. The addition of the buffer medium cancause the construction platform to float on the buffer medium when asufficient amount is added. The TPFS can be observed to determinewhether the desired flotation and fill levels are being maintained forthe TPFS

Next, in 342, the TPFS can be drained. In 344, a building can beconstructed on the construction platform. In 346, the utilities for theconstruction platform and/or the building can be connected. In 348, theutility connections can be tested and inspected. For a residentialbuilding, the testing may be used to ensure water, electricity, gasand/or sewage are being handled properly.

In 350, orientation maintenance mechanism can be installed. For example,the construction platform can be coupled to a cabling system asdescribed above. In 352, leveling mechanisms, if they have not alreadybeen integrated into the construction platform, can be installed. Forexample, mechanisms, such as ballast tanks and/or other systems whichcan be used to transfer a weight from one location to another can beinstalled.

In 354, the TPFS can be again filled such that the construction platformfloats. In 356, the alignment and leveling mechanisms can be tested. Forexample, ballast tanks can be filled or emptied and a positionmaintenance system, such as a cabling system, can be tested. In oneembodiment, as described below with respect to FIG. 11A, in 358, theTPFS can be sealed in some manner. For example, a cover can be placedover the buffer medium to prevent contamination from debris and/orevaporative losses.

In 360, the TPFS can be placed in an initial operation condition. Forexample, the construction platform can be leveled. Further, theconstruction platform can be positioned relative to the containmentvessel in a desired orientation. For example, as described above, theconstruction platform can be positioned such that some minimum spacingis maintained between the construction platform and features of thecontainment vessel, such as a sidewall. One the structure is completeand all live loads (people equipment, furniture, vehicles, etc.) areaccounted for the entire system can be fine-tuned and re-leveledcontinually as required.

TPFS Design Configurations

In this section, a number of different possible design configurations ofa TPFS, such as different shapes and configurations for a containmentvessel and a construction platform, are described with respect to FIGS.10A to 15C. In FIGS. 10A and 10B, two TPFS configurations, 410 and 420,each including a containment vessel 405, a buffer medium 404 and aconstruction platform 406 is shown. A multistory building 408 is builton top of the TPFS. The TPFS is constructed over and integrated intosome medium 402, such as compacted soil.

In this example, the containment vessel has a slanted sidewall 414. Insome instances, it may be desirable to shape a sidewall, such as 414, toeffect wave propagation within the buffer medium 404. It is believedadding slant to the sidewall can lessen wave propagation. Anotherbenefit of a slanted sidewall is that it may make egress out of thecontainment vessel easier, such as if someone accidently fell into tothe buffer medium 404 within the containment vessel 405.

The construction platform 406 includes a curved bow. The curved bow canbe used to lessen wave action in the buffer medium 404. Further, it canbe used to reduce forces from the waves transmitted into theconstruction platform such that unwanted vibration or rocking doesn'toccur. Many bow shapes are possible and the example shown in FIGS. 10Aand 10B is for the purposes of illustration only.

The sidewall 414 of the containment vessel merges into an end portion.In FIG. 10A, the end portion 412 is flush with the material 410 (e.g.,soil) surrounding the containment vessel 405. In FIG. 10B, the endportion 422 is raised. A raised end portion can prevent debris beingcarried into the containment vessel, such as debris carried by waterwhen it rains. In another embodiment, if the containment vessel is neara body of water, such as an ocean, the end portion 422 can be configuredto act as a seawall.

In FIG. 11A, a third TPFS configuration 430 is shown. In 430, theconstruction platform 406 includes an extended portion 438. It extendsbeyond the edge of the containment vessel 405 and interfaces with a ramp432 placed on the material 410 surrounding the containment vessel 405.Similar to FIG. 10B, the containment vessel 405 includes a slantedsidewall and a raised end portion 436. A sealing mechanism 434 issecured to the top of the end portion 436 of the containment mechanismand a bottom of the extended portion 438 of the construction platform.

The sealing mechanism 434 can prevent evaporation of the buffer medium404 if the material is prone to evaporation. In addition, it can preventinsects and small animals away from the buffer medium 404. Further, itcan prevent debris, such as dirt, leaves or trash, from entering thebuffer medium 404. The sealing mechanism 434 can extend around all or aportion of the perimeter of the containment vessel. In one embodiment,the sealing mechanism can be formed from a flexible material, such as aflexible polymer membrane. In another example, netting or some otherpermeable material can be used. The netting can allow air and water topass through but prevent larger objects, such as dirt, animals, largerdebris, etc. from entering the buffer medium.

In FIG. 11B, yet another TPFS configuration 450 is shown. In thisexample, the containment vessel 454 includes vertical sidewalls. Theconstruction platform 456 includes low density blocks, such as 458, anda sub-floor system 460 which is formed around the blocks 458. Thesub-floor system structure 460 extends into channels between the blocks(e.g., see FIG. 7A). A building 452 is constructed over the TPFS.

Next, with respect to FIGS. 12A and 12B, two TPFS configurations, 500and 520 supporting a large multi-story building 512 are described. In500, the TPFS includes a containment vessel 504, a buffer medium 506 anda construction platform 508. The construction platform 508 supports thebuilding 512. The construction platform 508 includes a number of lowdensity blocks 510.

In 520, the containment vessel 526 extends beyond the edge of the FIG.12B. The construction platform 508 includes two layers. In the firstlayer, blocks 510 are utilized. In the second layer, blocks 524 areutilized. The additional blocks 524 in the second layer provideadditional buoyancy to the construction platform 512. In FIG. 12B, theblocks 524 span the length of the building 512. In other embodiments,the blocks, such as 524, can be discontinuous such that voids areformed.

In yet other embodiments, more blocks can be provided in additionallayers. The additional layers can add additional buoyancy to theconstruction platform, such as to support the weight of a building at aparticular location. Further, additional layers can allow for a portionof building 512 to extend into the construction platform and possiblybelow the water line. For example, a swimming pool can be integratedinto the construction platform.

Next, with respect to FIGS. 13A and 13B, two TPFS configurations, 530and 540, which support a multistory building are described. In 530, theTPFS is constructed on and integrated with the ground 502. A containmentvessel for the TPFS has a number of different levels which allow fordifferent depths of the buffer medium. In particular, the TPFS includesportions 534 a and 534 b which have a first depth and portion 536between 534 a and 534 b which has a second depth. As shown in FIG. 13A,the buffer medium 506 covers each of the portions, 534 a, 534 b and 536,respectively. However, the depth of portion 536 can be high enough orthe level of the buffer medium low enough such that the buffer medium nolonger covers portion 536.

In 530, the construction platform 538 includes two separate portions 532a and 532 b which are primarily used to provide buoyancy of structure512. The separate portions 532 a and 532 b of the construction platform538 float in the two portions of the containment vessel, 534 a and 534b. Between the two portions 532 a and 532 b, i.e., the portion of theconstruction platform 538 over section 536 of the containment vessel,the structures used to provide buoyancy are minimal. In some instances,the construction platform can be configured such that the portion 538 isabove the buffer medium during normal operating conditions. The designis similar to a catamaran including two pontoons.

In 540, the TPFS includes two separate containment vessels 544 a and 544b. The containment vessels provide buoyancy, via buffer medium 506, fortwo portions, 542 a and 542 b, of the construction platform 552. Theconstruction platform 552 supports building 542. A connection to thebuffer medium (e.g., a pipe) can join the separate containment vesselsto ensure equal buffer medium levels and therefore a level constructionplatform. Additionally, separate construction platforms can be locatedtogether or within one another to provide differential heights as in afactory setting where underside access to a massive object is desired.Additionally, the entire TPFS can be repeated and installed within anexternal TPFS where extreme sensitivity/adjustability or isolation isrequired.

Between the two buoyancy providing portions 542 a and 542 b, theconstruction platform 554 is raised to a height above the ground 548.The height above the ground provides sufficient clearance for objects,such as cars 550, to be placed underneath the building 542. The heightof the construction platform 554 can be sufficient so that even if thebuffer medium 506 is removed from one or both of the containment vessels544 a or 544 b, a minimum clearance is provided. The height can beselected so that, at the very least, cars or other objects, which arecommonly placed under the construction platform, will not be damaged ifthe containment vessels 544 a or 544 b are drained.

In one embodiment, the containment vessels 544 a or 554 b can be joinedvia conduit 552. Conduit 552 can keep the level of the buffer mediumequal in both vessels. When the levels are uneven between the vessels,the construction platforms can tilt. In another embodiment, rather thankeeping the levels of the buffer medium in both vessels equal, thebuoyancy can be separately adjusted on each side of the constructionplatform 554 to keep it level.

With respect to FIGS. 14a and 14b , the use of multiple different typesof construction platforms with a TPFS including a containment vesselwith multiple heights is described. In TPFS configuration 560 in FIG.14A, a containment vessel with two levels is shown. In particular, thecontainment vessel includes a first level 580, joined by a slantedportion 582 to a second level 584. The second level 584 joins a slantedsidewall 586 which rises to ground level.

Two construction platforms 566 and 568, which are joined together, arefloated in a buffer medium 564. The first construction platform 566supports building 570 and the second construction platform 568 supportsbuilding 572. The construction platform is connected via deck 574. Thefirst construction 566 has a thicker buoyancy layer than the secondconstruction platform 568. Thus, the first construction platform 566 isfloated in the deeper portion 580 of the containment vessel. Thebuoyancy layer of the construction platform 566 may be thicker tosupport a heavier building.

The two construction platforms, 556 and 568, each include a top layer,which are level with one another as shown in FIG. 14a . The leveling canbe accomplished by controlling weight distribution systems in each ofthe construction platforms, such as a separate ballast system. In otherembodiments, the construction platforms can operate at different levels.In this case, the platform 574 can be joined via hinge mechanisms ateach platform 566 and 568. When the two constructions are operating atdifferent levels, the platform 574 can be sloped in one direction or theother depending on which of the construction platforms 566 or 568 ishigher than the other.

In the TPFS configuration 600 of FIG. 14B, the containment vessel 606also includes multiple levels, 612 a and 612 c. The upper level 612 aand lower level 612 c are joined by a sloped portion 612 b. In differentembodiments, the slope angle of section 612 b can differ. For instance,the section 612 b can be a vertical section.

A construction platform 608 is floated in a buffer medium 604. Theconstruction platform supports building 610. The construction platform608 includes two layers 614 a and 614 b. The upper layer 614 a extendsacross levels 612 a and 612 c of the containment vessel 606. The lowerlayer 614 b is only above the lower level of the containment vessel 612c. The lower layer 614 b may be provided to provide additional buoyancysuch as to support a denser portion of building 610.

An edge 616 of the lower layer 614 b is sloped to match the slope of thecontainment vessel 612 b. The edge 616 can be sloped to maintain anequal spacing between the edge 616 and the containment vessel 612 b. Forearthquake purposes, as described above, a spacing can be selected to bemaintained which is above some minimal value so that in an earthquakethe side of the containment vessel 612 b and the edge 616 don't strikeeach other with an unacceptable amount of force.

In other embodiments, the slope of edge 616 doesn't have to match theslope of the containment vessel 612 b. For example, the slope of edge616 can be vertical while the slope of section 612 b can be the same asshown in FIG. 14B. In this example, the horizontal distance between theedge 616 and the slope 612 b can vary from a maximum at the top to aminimum at the bottom. For earthquake purposes, the spacing at thebottom of the edge 616 can be maintained at or above some minimal value.

Next with respect to FIGS. 15A, 15B and 15C, three different TPFSdesigns 700, 720 and 740 are shown. The three designs, 700, 720 and 740,allow for similar buildings 708, 728 and 750 to be floated differentlyon a buffer medium 705 as compared to one another according to theirconstruction platform design. In 700, 720, and 750, buildings 708, 728and 750 are five story buildings. Building 708 is built on a TPFSincluding containment vessel 704, buffer medium 705 and constructionplatform 706. Building 728 is built on a TPFS including a containmentvessel 730, a buffer medium 705 and a construction platform 724.Building 750 is built on a TPFS including a containment vessel 746, abuffer medium 705 and a construction platform 752.

In 700, 720 and 740, the containment vessels are built on a medium 702and include sloped sides. However, the containment vessels 704 and 746are deeper than containment vessel 730. The construction platforms 706and 724 each have curved bows 716 and 728, and are constructed fromrectangular blocks 714 and 722, respectively. The platforms, 706 and724, differ in that platform 706 has two levels 710 and 712 as comparedto a single level for platform 724. In addition, platform 706 useslarger and fewer low density blocks, 714, as compared to the low densityblocks 722, used for construction platform 724. The larger blocks allowthe construction platform 706 to float higher in the water as comparedto construction platform 724.

In 740, the building 750 is built on a construction platform 750,floated on a buffer medium 704 above containment vessel 746. Thecontainment vessel 746 is shaped similarly to the other containmentvessels in configuration 700 and 720. In 740, the platform 748 includesa portion 748 that extends away from the platform 750 differently thanthe other two TPFS configurations. In addition, a bow of constructionplatform 750 is shaped differently as compared to platforms 706 and 724.Platform 750 uses a similar number of low density blocks as compared toplatform 700. Thus, both platforms float at a similar height in theirrespective containment vessels.

Flood Only Configuration and Temporary Buffer Medium Design

In this section, a TPFS designs, 770 and 780, for mitigating only flooddamage are described with respect to FIGS. 16A, 16B and 16C. Inaddition, one embodiment is described where a temporary buffer medium isused. In FIG. 16A, a building 776 is constructed on top of a TPFSconfiguration 770. The TPFS is shown in a drained state (no buffermedium is present). The TPFS includes a construction platform 774 andcontainment vessel 772 built into the ground 702.

The construction platform 774 abuts the sides of the containment vessel772. In flood conditions, the containment vessel 772 can fill with waterwhich acts as a buffer medium allowing the construction platform to riseup and preventing the building 776 from being damaged. When the floodwaters recede, the construction platform can be returned to its initialposition. In a flood condition, the sloped sides of the constructionplatform 774 may allow the platform to center itself as the flood waterrecedes. As described above, the construction platform 774 can include anumber of low density blocks.

In an alternate embodiment, design 770 can be used for earthquakemitigation and flood damage mitigation. In this design, a spacing wouldbe provided between the sides of the containment vessel 772 and theconstruction platform 774. At most times, the TPFS design 770 canoperate in a dry condition with no buffer medium present. When anearthquake is detected, a buffer medium can be provided. As an example,when an earthquake is detected, water tanks can be operated to releasewater that acts as a buffer medium allowing the construction platform774 and building 776 to float above the containment vessel during anearthquake.

In another embodiment, the construction platform 774 can be magneticallylevitated using principles associated with maglev trains. When anearthquake is detected, a magnetic repulsive force can be generatedwhich can lift the construction platform 774 and building 776. Whilelevitating, the containment vessel 772 can move underneath the building776 without seismic forces being transferred to the constructionplatform and the building.

Returning to FIGS. 16B and 16BC, a TPFS design 780 similar to design 770is shown. In 780, a water conduit system is provided with thecontainment vessel 772. The water conduit system includes pipes 782 aand 782 b. The flood water can enter pipes 782 a and 782 b and thenenter the TPFS during flood conditions via an inlet. The capacity of thepipes can be designed to control a rate at which the constructionplatform rises. The construction platform 774 can include channels, suchas 784, that allow the water to penetrate underneath the platform 774.The channels can prevent suction effects from holding down the platform774 as water rises in the TPFS.

Embodiments of the present invention further relate to computer readablemedia that include executable program instructions for performingrecruiting techniques described herein. The media and programinstructions may be those specially designed and constructed for thepurposes of the present invention, or any kind well known and availableto those having skill in the computer software arts. When executed by aprocessor, these program instructions are suitable to implement any ofthe methods and techniques, and components thereof, described above.Examples of computer-readable media include, but are not limited to,magnetic media such as hard disks, semiconductor memory, optical mediasuch as CD-ROM disks; magneto-optical media such as optical disks; andhardware devices that are specially configured to store programinstructions, such as read-only memory devices (ROM), flash memorydevices, EEPROMs, EPROMs, etc. and random access memory (RAM). Examplesof program instructions include both machine code, such as produced by acompiler, and files containing higher-level code that may be executed bythe computer using an interpreter.

The foregoing description, for purposes of explanation, used specificnomenclature to provide a thorough understanding of the invention.However, it will be apparent to one skilled in the art that the specificdetails are not required in order to practice the invention. Thus, theforegoing descriptions of specific embodiments of the present inventionare presented for purposes of illustration and description. They are notintended to be exhaustive or to limit the invention to the precise formsdisclosed. It will be apparent to one of ordinary skill in the art thatmany modifications and variations are possible in view of the aboveteachings.

While the embodiments have been described in terms of several particularembodiments, there are alterations, permutations, and equivalents, whichfall within the scope of these general concepts. It should also be notedthat there are many alternative ways of implementing the methods andapparatuses of the present embodiments. It is therefore intended thatthe following appended claims be interpreted as including all suchalterations, permutations, and equivalents as fall within the truespirit and scope of the described embodiments.

What is claimed is:
 1. A foundation system for a structure, comprising:a containment vessel configured to hold a buffer medium, the containmentvessel placed on a ground; and a construction platform formed above thecontainment vessel wherein the construction platform including thestructure is configured to float on the buffer medium wherein theconstruction platform is formed from a plurality of pre-fabricatedunits, each of the pre-fabricated units including attachment points forsecuring the pre-fabricated units to other pre-fabricated units; and aballast system for distributing weight from one side of the platform toanother side of the platform; wherein the construction platform ispositioned relative to sides of the containment vessel such that duringan earthquake the containment vessel can move from side to side whilethe construction platform floats above it allowing seismic forcestransferred from a ground to the construction platform to be minimized.2. The foundation system of claim 1, wherein the ballast system includesat least two tanks each configured to hold a liquid.
 3. The foundationsystem of claim 2, wherein the at least two tanks are fluidly coupledallowing the liquid to be moved between the tanks.
 4. The foundationsystem of claim 2, wherein the liquid is water.
 5. The foundation systemof claim 1, wherein the pre-fabricated units are formed from concrete.6. The foundation system of claim 5, wherein the concrete ispre-tensioned.
 7. The foundation system of claim 5, wherein the concreteis post-tensioned.
 8. The foundation system of claim 1, wherein thepre-fabricated units have a rectangular shaped cross section.
 9. Thefoundation system of claim 1, wherein the buffer medium is a liquid andan additive is mixed with the liquid to change its density.
 10. Thefoundation system of claim 1, wherein the buffer medium is contained ina bladder and wherein the bladder and the buffer medium is less densethan water and wherein the bladder is coupled to the constructionplatform such that during flood conditions, the bladder is coupled tothe construction platform to provide additional buoyancy.
 11. Thefoundation system of claim 1, wherein the buffer medium is contained ina bladder and wherein the bladder and the buffer medium is denser thanwater and wherein the bladder is coupled to the construction platformsuch that during flood conditions, the bladder is configured to decouplefrom the construction platform.
 12. The foundation system of claim 1,further comprising a tethering mechanism for securing the constructionplatform in place.
 13. The foundation system of claim 1, furthercomprising a sealing mechanism installed between the constructionplatform and the containment vessel configured to prevent debris fromentering into the buffer medium and/or preventing evaporation of thebuffer medium.
 14. The foundation system of claim 1, wherein thecontainment vessel is formed using concrete.
 15. The foundation systemof claim 1, wherein the pre-fabricated units are formed from low densityblocks and concrete.
 16. The foundation system of claim 1 furthercomprising one or more non-weight bearing members which secure theconstruction platform in place, wherein the one or more members aremechanically fused and designed to break when shaking from theearthquake is above a particular magnitude.
 17. The foundation system ofclaim 1, wherein the buffer medium is a solid material with an abilityto turn into a liquid or to act as a liquid during the earthquake. 18.The foundation system of claim 1, wherein the structure is a multistorybuilding.
 19. A foundation system for a structure, comprising: a firstcontainment vessel configured to hold a buffer medium, the containmentvessel placed on a ground; a second containment vessel, separate fromthe first containment vessel, configured to hold the buffer medium, thecontainment vessel placed on the ground; a construction platform,including the structure, formed above the first containment vessel andthe second containment vessel, wherein the construction platformincludes a first portion configured to float on the buffer medium in thefirst containment vessel and a second portion configured to float on thebuffer medium in the second containment vessel; a ballast system fordistributing weight from one side of the platform to another side of theplatform; and a surface of the ground between the first containmentvessel and the second containment vessel a distance beneath a bottom ofthe construction platform; wherein the first portion of the constructionplatform is positioned relative to sides of the first containment vesseland the second portion of the construction platform is position relativeto sides of the second containment vessel such that during an earthquakethe first containment vessel and the second containment vessel can movefrom side to side while the construction platform floats above itallowing seismic forces transferred from a ground to the constructionplatform to be minimized.